package com.itheima.reggie.controller;


import com.itheima.reggie.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.UUID;

@RestController
@RequestMapping("/common")
@Slf4j
public class CommonController {
    @Value("${reggie.path}")
    private String basePath;


    @PostMapping("/upload")
    public R<String> upload(MultipartFile file)  {

        //获取原来图片的名称
        String originalFilename = file.getOriginalFilename();
        //获取原来图片的后缀名
        String substring = originalFilename.substring(originalFilename.lastIndexOf("."));
            //组装新的图片名
        String fileName= UUID.randomUUID().toString()+substring;
        File dir = new File(basePath);
        if (!dir.exists()){
            dir.mkdirs();
        }
        try {
            file.transferTo(new File(basePath+fileName));
        } catch (IOException e) {
            e.printStackTrace();
        }

        return R.success(fileName);
    }
@GetMapping("/download")
public void download(String name, HttpServletResponse response){

    try {
        FileInputStream fis = new FileInputStream(new File(basePath+name));

        ServletOutputStream outputStream = response.getOutputStream();

        response.setContentType("image/jpeg");

        int len=0;
        byte[] bytes=new byte[1024];

        while ((len=fis.read(bytes))!=-1){
            outputStream.write(bytes,0,len);


        }
        outputStream.close();
        fis.close();


    } catch (Exception e) {
        e.printStackTrace();
    }



}

}
